Which valve allows blood to leave the left ventricle and enter the aorta?

Which valve allows blood to leave the left ventricle and enter the aorta?

• A. Pulmonary valve
• B. Mitral valve
• C. Aortic valve
• D. Tricuspid valve

Answer: (C)

The aortic valve. It sits between the left ventricle and the aorta and opens to let blood be ejected into the systemic circulation when the left ventricle contracts. It closes during diastole to prevent blood from flowing back into the ventricle. The other valves serve different connections: the pulmonary valve is between the right ventricle and the pulmonary artery; the mitral valve lies between the left atrium and left ventricle; the tricuspid valve lies between the right atrium and right ventricle.

The aortic valve. It sits between the left ventricle and the aorta and opens to let blood be ejected into the systemic circulation when the left ventricle contracts. It closes during diastole to prevent blood from flowing back into the ventricle. The other valves serve different connections: the pulmonary valve is between the right ventricle and the pulmonary artery; the mitral valve lies between the left atrium and left ventricle; the tricuspid valve lies between the right atrium and right ventricle.